Look at this I5 3570K vs I5 4670K comparison

I found on internet the possibility to compare the new haswell I5 4670K with any CPU. I selected the Ivo Bridge I5 3570K

see this link

http://www.cpu-world.com/Compare/579/Intel_Core_i5_i5-3570K_vs_Intel_Core_i5_i5-4670K.html

Some things I think is weird here,

For the old Ivo Bridge only it's stated as an advantage that

'this microprocessor has unlocked clock multiplier. The CPU can be freely overclocked on most motherboards if greater performance is required.'

What have I missed ? Isn't this also the case for the I5 4670K ?

Also for the haswell it's stated as an drawback that it's less energy efficient.

Wasn't that one thing that was supposed to be improved ?